Dandy-roll.



H. ALBRO.

DANDY ROLL.

APPLICATION FILED MAR. 1, 1911.

1 29,007. Patented June 5, 1917.

INVEN TOR.

A TTORNE Y.

, DANDY-ROLL.

Specification of Letters Patent.

Patented June 5, 1917.

Application filed March 1, 1917. Serial No. 151,707.

To all whom it may concern:

Be it known that I, HERBERT ALBRO, a

citizen of the United States of America, and resident of WestSpringfield, in the county of Hampden and State of Massachusetts, haveinvented certain new and useful Improvements in Dandy-Rolls, of whichthe following is a full, clear, and exact description. I

This invention relates to improvements in dandy rolls and moreespecially to the construction of the openwork cylindrical frame whichsupports the outer gauze covering of the roll. I

The object of the invention is to provide an openwork supporting framecomprised in the dandy roll which is diametrically expansible andcontractible, whereby an indefinite number of outer gauze watermarkingcoverings may be employed on a single supporting frame, thereby greatlylessening expense in a paper mill, and also materially saving space forstowage.

As a result of the exercise of thisinvention, it is possible to providea dandy roll supporting frame which is so practical, easy and convenientof utilization as to render it acceptable and desirable to a paper millowner.

The invention is described in conjunction with the accompanying drawingsand is set forth in the claims.

In the drawings Figure 1 is a central longitudinal section, showing anexemplification of a dandy roll constructed in accordance with myinvention.

Fig. 2 is a cross section on a larger scale, as taken on line 2-2, Fig.1.

In constructing this roll, in a practical and entirely operative manner,I provide a central shaft A having right and left hand screw threads asa at its opposite end portions.

B and B represent a pair of sleeves loose and endwise slidable towardand away from each other on the shaft, and these sleeves are arrangedwith a space between the inner ends thereof within which space isprovided a coil spring b, in compression and reacting against thesleeves to force them in an out ward direction.

C C and C O represent circular plates of spring metal, which are ofdished or concavo-convex form, secured to, or made unitary withthesleeves.

These plates are made with radial slitse which extend from their outeredges radially, but not entirely to their centers, forming segmentalsections (Z, hating are shaped outer edges f.

These plates are secured with the convexities thereof in reversedrelations as regards the sets thereof, which are at opposite sides ofthe lineal center of the frame, that is as exemplifiedin the drawing,the plates C C at the left hand half of the frame have their bulge orconvexity to the leftward, while the plates C C comprised within theright hand portion of the frame have their convexity toward therightward.

Each of the segmental sections (Z has sets of longitudinal wires 7Lsecured thereto at its arc edge.

This frame, furthermore, comprises series of partially encircling wires2', those of a given series,-in suitably spaced relations,- beingsecured to a given set, understood as corresponding thereto, of thelongitudinal wires, that is, those which are carried by one of thesegmental sections; and the partially encircling wires of a given seriesare extended for overlapping and free relations to longitudinal wires ofadjacent sets thereof.

In illustration of this, it will be perceived with reference to thedrawing, Fig. 2, that the wires 2', given series, and attached, bysoldering or otherwise, -to the longitudinal wires h, carried by theleft hand segmental section (Z, extend to overlapping relations with,but are unsecured to longitudinal wires carried by the adjacentsegmental sections, that is, as here shown and .pointed out in thedrawings, the upper section and the lower section.

The right hand partially encircling wires secured to the longitudinalwires, which are carried by the right hand section, are in duplicationof those shown at the left of the view.

In this drawing, for the purpose of showing attached and unattachedrelations of the partially encircling wires, and the longitudinal wires,the former are shown as slightly distorted at their extremities for thepurpose of more clearly indicating the clearance.

The relations of the partially encircling wires of the upper and lowersegments to those of the opposite side segments are reciprocal, andthose of one series are disposed to lie alternated with or intermediatebetween those of-another series, for the production of an-outersupporting portion of the dandy roll frame having on a casual understoodas comprised in a inwardly, they cause a diminution of the convexity ofthe dished spring metal plates comprising the individual andindependently operable segmental sections for a corresponding increaseof diameter and increase of the circumference, or expansion, of thelongitudinal and partially encircling wires to have a crowding fit orbind within the removable and interchangeable outer gauze covering orsheath m.

The release of the nuts by turning them outwardly permits the segmentcomprising spring plates, under their natural reaction, to contract inassuming their normal increased convexity, reducing the diametricaldimension. 7 I

The interposed spring, 6 is effective to form a medium of resistance atthe inner ends of the sleeves, and to automatically as sist in theaction of contraction when the nuts are turned in the proper direction.

Aluminum is susceptible of employment as the constituent of the segmentincluding spring plates, but any metal having fitness to the purpose toform the plates or any other part or parts of the dandy is understood asbeing a mere matter of selection.

Changes within a considerable range of variation may be made in theconstruction of the openwork dandy roll frame without departing fromthis invention and without impairing the advantages thereof.

I claim 1. Ina dandy roll, an expansible and contractible openwork framecomprising circular concavo-convex spring plates having radial slitsextending from their outer edges toward but not entirely to, theircenters, forming segmental sections having are shaped outer edges, setsof longitudinal wires secured to the are shaped edges of the sections,series of partially encircling wires, those of a given series beingsecured to a corresponding set of the longitudinal wires and beingextended for overlapping and unattached relations with longitudinalwires of adjacent sets, and means for varying the degree of theconvexity'of the spring plates, to consequently vary their diametricaldimension and that of the dandy roll frame.

2. In a dandy roll, an expansible and contractible openwork framecomprising circuand being extended for overlapping and unattachedrelations with longitudinal wires of adjacent sets, and means forvarying the degree of the convexity of the spring plates, toconsequently vary their diametrical dimension and that of the dandy rollframe, as a whole. r

3. In a dandy roll, an expansible and contractible openwork framecomprisinga central shaft having right and left hand threads at itsopposite end portions, a pair of sleeves loose and slidable on the shaftand having a space between their inner ends, a spring between the innerends of the sleeves and exerting force thereon in opposite directions,circular concavo convex spring plates having radial slits extending fromtheir outer edges toward but not entirely to their centers, formingsegmental sections having are shaped outer edges, said plates beingsecured in reversely convex relations to both of the sleeves, setsoflongitudinal wires secured to the are shaped edges of the sections,series of partially encircling wires,

7 those of a given series being secured to a corresponding set ofthelongitudinal wires, and being extended for overlapping and freerelations to longitudinal Wires'of adjacent sets, and nuts on theoppositely reversely threaded end portions of the shaft coacting withthe outer ends of the sleeves.

4. In an openwork expansible and contractible supporting frame for adandy-roll outer-covering, sets of parallel longitudinal wires, those ofall the sets being arranged to conform to the circumference ofa7cylinder,longitudinal wires comprised in each set having are shapedcircumferentiallyextending wires secured thereto, and which have theirextremities extended for overlapping and unattached relations tolongitudinal wires comprised in other of the sets, and means forcontracting and expanding the longitudinal wires diametrically of thestructure. v

Signed by, me at Springfield, Mass, in presence of a subscribingwitness.

HERBERT ALBRO. Witness:

WM. S. BELLOWS.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents,

Washington, D. 0.

